Everything You Didn't Know About The Earth's Interior

Planet Earth is a complex engineering marvel, an "Earth Machine" driven by a core as hot as the surface of the sun and as massive as the moon. While we inhabit the dry land of the continents, three-quarters of our world remains hidden beneath the waves, a vast, uncharted territory of 17-kilometer-high volcanoes, canyons that dwarf the Grand Canyon, and a 65,000-kilometer undersea mountain range that is the most active geological structure in the solar system.

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